Universal drafting table



July 10, 1928.

M. REID UNIVERSAL DRAFTING TABLE original Filed May 6. 1922 6Sheets-$heet 1 min July 10, 192s.

M, REID UNIVERSAL DRAFTING TABLE Criginal Filed y 6. 1922 e Sheets-Sheet2 July 10, 1928.

M. REID UNIVERSALDRAFTING TABLE 6 Sheets-Sheet I5 Original Filed y 6.1922 July 10, 1928. 1,676,746

M. REID UNIVERSAL DRAF'IING TABLE Original Filed y 6. 1922 6Sheets-Sheet 4 HHHH July 10, 1928.

M. REID UNIVERSAL DRAFTING TABLE Original Filed y 6. 1922 6 Sheets-Sheet6 E JM MW;-

July 10, 1928.

M. REID UNIVERSAL DRAFTING TABLE j 6M ay 5 board frame.

Patented July 10, 1928.

UNITE s r MARCELLUS REID, 0F CLEVEZAND, OHIO.

UNIVERSAL DRAFTING :TAIBLE Application meme 6, 192 2, Serial no.559.0941, Renewed April 2c, 1927.

My invention relatesfit'o improvements in 'universal tables forengineers, architects,

artists and draftsmen, and it is designed to give the greatestconvenience 'andefliciency to the user and to avoid and eliminate theunhealthful conditions connected with the use of the ordinary table fordrafting, used by engineers,- draftsmen and architects, and is ofsubstantial construction.

To provide the ideal conditions for workingovera table of this kind, thefollowing main features are provided in my invention: I

1st. A substantial'base and colu'mn with means for rapidly elevating andlowering the table. V

2nd. Means for conveniently and rapidly inclining the table from ahorizontal position to a vertical position. i i

3rd. A table consisting of ametal franie, designed so as to givethegreatest strength and rigidity, with minimum: weight, being madeprincipally of sheet steel and'spotwelded or riveted together, thetabl'e'containing parallel working angles or strips at opposite ends onwhich "IT-squares or other instruments are used, thus avoiding theerrors due to the inaccuracy and changing conditions of drawing boardswhen .only the edge of the boardis depended upon.

4th. Means forrevolving or turning the table in any position and meansfor -holdin'g a drawing board within a frame with means for quicklydetaching or removing the drawing. boardso as to use one or moreboardswithout removing the drawlngs from'the boards.

. In the accompanying drawings Fig. l is a front elevation or viewof-the apparatus;

Fig. 2. is a side elevation or view of. the

same; Fig. 3 is an enlarged view of a section of Fig. 1, showing themeans for elevatlng "or lowering the table, and means for in'clining thetable or support for thefdrawing Fig. 4 is a side vie'wof Fig. 3, boththese views containing dotted; lines showing the construction of thegearing for.

operating or providing the variousn ovements required 'toadjustthe tablein any position, thereby providing universal adjustment; Fig. 5 isasectional plan view of I thevtable frame; Fig-6 is a verticalflsectionofthe table frame shown in Fig 5 looking in direction, of. the arrows ondotted line 13-13 (Fig. 7) the strips of wood P f and angles R beingshown on a section at 'the dotted line 1 4 ,14 in directionof the rows;Fig. 7 is apart front sectional view of the table frame; Fig. 8 is asectional View of the clampingdevice taken on a horizontal section at(Fig; 4;) looking'in direction of arrows; Fig. 9 1s a vertical sectionat -9 i looking'in direction or the arrows; Fig. 10 is a sectional Viewof the elevating gearshown at l 0'10 (Fig. 3) in d1rect1o11 of thearrows; Fig. 11 is a top view of the complet'etable frame with the drawing boardv detached; Fig. 12 is a sectional view at 12-42 (Fig. 11)including the draw- I ing board; Fig. 13 is an end view of the drawingboardlframe or table; Fig. 14 is a I frontv1ew-'andF1g. 15 is an endview of a F construction above the column to be used when no mClmmgadu'stment is'used and I I i justment of the table, shown inFigs.'3 and,

substitutes the mechanism forinclining ad.

4; Fig. 16 shows a similar "construction to when a fixed incline to thetable is required.

In operation of this table, vertical adjustfastened to the end of theworm spindle that shown in Figs. 14;,and15, tobe used- 0-said spindlebeing integral withfthe worm d whichnieslles with the gear alsoshownonFig. 10 in section'said worm gear-being fastened to the spindleff which I is integral with the pinion. g said pinion meshing in therack it shown in dotted lines on 3 andinsection on Fig. 10. a

For ease of operatiomfla ball thrustbearing is provided at i (Fig, whichtakes'the .thrustof' the spindle candthe outer enldof the spindlecsupported in thebearing j, the s opposite 'end suppo rted in the bearing7 It will be evident that turning the handwheel a. in onejdirectionwill. elevate the rack spindle h and in the opposite direction willlower same. The rack spindle is provided with a'spline or' keyway y'z'shownin dotted lines (Fig. 3) andins'eCtiOn (Fig.

10). Engaging this keywayor spline is a block or key (Fig. 3) held inplace by the clamping screw j? (Fig. 8). I The screwij isrused to clampthe key 3' and also to clamp the elevating spindle ii. At-the upper endofthe rack spindle h is fastened the tablesupportingframe A (Figs. 1, 2,,3

and 4) whichis fastened to this spindle by the screw m. and'otherwisekeyed to hold the frame rigid to the rack spindle It.

For tilting the table, the hand wheelfa 7 (Figs. 1,3, and f)isfastenedto the end of the worm spindle (Figs. 4c and 9) on which iskeyed the worm d (Figs. 4 and 9) which meshes with the gear 6 (Figs. 4and 9). .j WVorm gear 6 is fastened to the spindle f (Figs. 4c and 9)which is integral with the pinion 9 The gear 9 (Fig. 9) meshes with therack h (Figs. 1, 2 3 and 4) as the rack fastened to' the spindle f willthru the pin' 71, is supported'by the spindle 2' (Figs. 1, '2, 3'and 4).7 hand wheel a in one direction will transmit motion thru the worm d ,tothe worm gear 6 ion'g} raise or lower the rack h and swing it around thecenter supporting spindle 5 thereby tilting the table which is fastenedto the top, plate J to which the table frame (Fig. 11) is fastened. Thetop plate J is constructed with a sleeve Kprojecting down- 'wa'rd'intothe hub KK of the casting or inclining segmental rack hlwhich. rests onI the ball bearing 11.

Inside ofthis sleeve is provided the stud OI SPIDCllG M (Fig.4) and asshown in, crosssection F 1g. 8.

This stud or spindle M is preferably made of a tubular constructiontoreduce the weight, and theupper end rigidly fastened in thehub of thetop plate J. The clamping device shown in" cross section (Fig: 8)

consisting of the spindle N which is threaded on opposite endsi'one endfor the biiid'ing lever o and the opposite end for the nut 79. Thespindle N is provided with a shoulder Q, which by thegbinding nut 19 isrigidly clamped in thehub of the segmentcasting h" which is partly shownin cross section (Fig. 8). The binding lever 0 bearing against thebushing r compresses the cast-ingv which 1s slotted atthe shoulder ofthe spindle'N, and thus binds thespindle Mdthereby holding the tableinany position around theaxis of the spindle M.

The drawing board AA shown in longitudinalsection (Fig. 12) and crosssection 6) is preferablymade of several strips or; boards, and isheldtogether by the steel channel shaped cleats fastened to the under sideof the board, and the cleats B have an extended flange C (Fig. 7)atopp'osite ends of the board, which support the board on the metalframe. ,At thelower partof the channels BIin opposite ends of same,

there are square or rectangular holes D (Fig.

At one side ofthe board supporting frame there is a pair of angle shapedlugs E (Figs-5, 6 and 11).v These lugs fit into the holes D ofthechannels B (Fig. 6). On

the opposite side there are similar lugs made adjustable by the screws F(Figs. 6 and 13) on the outer end 'of which is, fastened the knurledhandles G (Figs. 1, 2,6, 7 12 and 13). These adjustable lugs arefastened to the plates H (Figs. 6, 7, 12 and 13) which are fastened .tothe adjustable angle lugs by the screws I (Figs- 5 and 6). Theplates Itis evident that turning the .H are' made so as to form a recess H (Fig.6) which engages the opposite sides of the opening in the metal frame atH (Fig. 5). The screw lugs 'G (Figs. 6 and 7 rotatably support thescrews F. It will be understood that adjusting the screws F outward willclamp the lugs E at opposite ends of the channels Bin the holes D, ofsame, thus holding the drawing board rigidly in the supporting frameand. reversing the opera tion, orunscrewing the screws F [will re leasethe drawing board from the metal frame. Thus it will be'easy' to attachor detach the drawing boards from the metal frame, and exchanging oneboard for another very quickly.

The metal frame is made of light sheet steel,

but by the novel construction is very strong and rigid; the main sectionbeing made of one piece as shown in F ig. 12, which is formed in theshape of a'series of channels MM in the metal supporting frame, therebypro-.

viding accurate means of supporting the T square onfanyof the four sidesof the drawing board, but in this case, I prefer to use on the frontandback of the metal frame the woodstrips P (Figsf5, 6, 7, 11, 12 and 13)and these wo'odstrips to be "used the same as the metal angles on theends of the frame if desired. The sides of the metal frame areconstructed of the angles (Figs. 6 and 13) on which are attached theangles R(Figs. 5 and 13) and on these angles-are attached the Woodstrips P (Figs/1,2, 5, 6, 7, 11 and 13). These anglesQ, are spotweldedor otherwise fastened to the main section MM. The end angles 0 reach theto theends of the side angles Q, and the edge or upper face of the endangles S. The side angles Q, in turn are spot-welded or] otherwisefastened to the flaps S on. the

ends ofthe channel member MM. Itw'ill Y 120 be thus understood that by.comparatively light weight sheet' metal, a rigid frame is provided,

all parts being spot-welded,

whole width of the'frame' and are fastened riveted or otherwise fastenedtogether, and

thatthe'inaccuracy of the edges of a drawing board, due to the expansionand shrinking of the board, will have no effect on the accuracy'of-the'work, as the board is rigidly held in the metal frame bywhich"the T- square or other instruments are controlled 1": I,

when in use.

The above description of providing means for fastening and clamping thetop plate J which supports the table frame, (Figs. 11, 12 and 13)applies also to Figs. 14, 15

and 16 in which similar letters apply to similar parts, except wherethis construction 1s used the sleeve Y is used for a horizontalnon-inclinable table, and the sleeve Z is used for a fixed inclinedtable.

What I claim is: i

1. A drawing table comprising a vertically disposed support, ahorizontally disposed frame fastened to said support, said frame beingformed of sheet metal bent to define a series of reversely disposedchannels, T square guides carried by said frame, a drawing boarddetachably connected to said frame, and means for clamping said drawingboard to said frame.

2. A drawing table comprising a vertically adjustable support, ahorizontally disposed frame fastened to said support, said frame beingformed of sheet metal bent to define a series of reversely disposedchannels, angle irons fastened to opposite sides of said frame andforming T square guides,

' a drawing board. adapted to rest on said frame being formed of sheetmetal bent to define a series of reversely disposed channels, angleirons fastened to opposite sides of said frame, wood strips fastened tosaid angle irons, a drawing board adapted to rest on said frame, saiddrawing board having cleats provided with apertures therein, lugscarried by said frame and adapted to engage in said apertures and meansfor movlng certain of said lugs thereby to fasten said board to saidframe.

5. A. drawing table comprising a vertically adjustable support, ahorizontally disposed frame fastened to said support, said frame beingformed of sheet metal bent to define a series of reversely disposedchannels, angle irons fastened about the sides and ends of said frame.one pair of said angle irons serving as guides for a T square, the otherpair ofsaid angle irons having wood strips fastened thereto, a drawingboard adapted to rest on said frame, and means for detachably connectingsaid board to said frame.

MARCELLUS REID.

